kernel: trace: Mundane typo fixes in the file trace_events_filter.c

s/callin/calling/

Link: https://lkml.kernel.org/r/20210317095401.1854544-1-unixbhaskar@gmail.com



Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com>
[ Other fixes already done by Ingo Molnar ]
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>